Product Overview

The 330500-06-02 is a high-precision Velomitor piezoelectric velocity transducer manufactured by Bently Nevada. This sensor is specifically engineered to measure absolute casing vibration, providing critical data for the protection and monitoring of rotating machinery. Unlike traditional moving-coil velocity sensors, the 330500-06-02 utilizes solid-state integrated electronics to convert a piezoelectric signal into a velocity output. This design eliminates internal moving parts that are prone to mechanical wear, ensuring a longer service life and higher reliability in demanding industrial environments. It is a fundamental component for Turbine Supervisory Instrumentation (TSI) and general machinery health programs.

Essential Performance Attributes

• Transducer Type: Piezo-velocity (Solid-state electronics)

• Measurement Range: Designed for absolute vibration of bearing housings and casings

• Sensitivity: Standard 3.94 mV/mm/s (100 mV/in/s) ±5%

• Frequency Response: 4.5 Hz to 5,000 Hz (270 to 300,000 cpm) ±3.0 dB

• Mounting Orientation: Omni-directional (can be installed at any angle/orientation)

• Construction: Hermetically sealed 316L stainless steel housing

• Connector Type: 2-pin MIL-C-5015 style top connector

• Environmental Rating: Rated for hazardous areas with appropriate barriers

The 330500-06-02 is particularly valued for its ability to maintain signal accuracy across a wide temperature range and its immunity to the "stiction" issues often associated with older electromechanical velocity sensors.

Practical Engineering Applications

The Velomitor 330500-06-02 is utilized across various sectors to detect mechanical anomalies such as unbalance, misalignment, and structural looseness. Key applications include:

• Bearing Housing Monitoring: Measuring the absolute vibration levels on the bearing caps of pumps, motors, and fans.

• Gas and Steam Turbines: Providing secondary casing vibration data to complement proximity probe displacement measurements.

• Balance-of-Plant (BoP) Equipment: Cost-effective monitoring of auxiliary rotating assets like air compressors and cooling water pumps.

• Integrative Protection Systems: Interfacing directly with Bently Nevada 3500/42M or 3500/44M vibration monitors for automated alarm and shutdown capabilities.

• Remote Sensing: Delivering stable vibration signals over long cable runs to centralized control rooms or diagnostic software platforms.